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## Homework Statement

An arrow fires horizontally at 41 m/s travels 23 m horizontally. From what height was it fired?

Vi = 41 m/s

a = g = -9.8m/s

x = 23m

## Homework Equations

Vf = Vi + at

X = Xi + Vit + 1/2at^2

Y = Yi + Vit + 1/2at^2

## The Attempt at a Solution

A.) Time to reach ground

Vf = Vi +at =>

Vf - Vi/a = t =>

0 - 41/-9.8 = 4.2s

B.) Height of Cliff

y = Vit + 1/2at^2 =>

y = 41(4.2) + 1/2(-9.8)(4.2^2) =>

y = 85.76m